{
  "type": "object",
  "properties": {
    "f1": {
      "type": "integer"
    },
    "f2": {
      "type": "number"
    },
    "f3": {
      "type": "string"
    }
  },
  "propertiesOrder": [
    "f4",
    "f2",
    "f1"
  ]
}